<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    const [{ uname, age, family, family: { matherAge, matherUname } }] = [{
      uname: '张三', age: 18, family: {
        matherUname: '王六',
        matherAge: 28
      }
    }]
    console.log(matherAge);
    console.log(family);
  </script>
</body>

</html>